CD 43 BFN several days positive OPK?

I’m so confused I’m on CD 43 tested this morning and got a BFN. For over a week I have had weird on and off pinching, bubble feeling, twinges in my lower left which are much different than how pms cramps feel for me. My last two cycles were 31 and 28 days but my PCOS makes them irregular. 6 days ago I had just a teeny bit of pink cm and that was it. The past week I’ve been having these on and off side stitch feeling in my lower left uterus area and still a BFN. I also had several days of positive OPK and then April 3 my LH went lower right before I got the pink CM. I started with positive OPK March 19, 20, 23, 27, 30 and the first negative OPK I got was April 3. (I didn’t test every day just these days)

March 19

March 23

March 27

April 3 ( first negative)

These are the days my partner and I DTD